K2-139 b: a low-mass warm Jupiter on a 29-day orbit transiting an active K0 V star

2 Feb 2017O. BarragánD. GandolfiA. M. S. SmithH. J. DeegM. C. V. FridlundC. M. PerssonP. DonatiM. EndlSz. CsizmadiaS. GrziwaD. NespralA. P. HatzesW. D. CochranL. FossatiS. S. BremsJ. CabreraF. CusanoPh. EigmüllerC. EiroaA. EriksonE. GuentherJ. KorthD. Lorenzo-OliveiraL. ManciniM. PätzoldJ. Prieto-ArranzH. RauerI. RebollidoJ. SaarioO. V. Zakhozhay

We announce the discovery of K2-139 b (EPIC 218916923 b), a transiting warm-Jupiter ($T_\mathrm{eq}$=547$\pm$25 K) on a 29-day orbit around an active (log $R^\prime_\mathrm{HK}$ = $-$4.46 $\pm$ 0.06) K0 V star in K2 Campaign 7. We derive the system's parameters by combining the K2 photometry with ground-based follow-up observations... (read more)

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